Synchronous regulating valve

Abstract

The invention relates to a synchronous regulating valve, and relates to the technical field of regulating valves. Comprising a valve body, an adjusting piece and a valve element, the adjusting part comprises a valve seat sliding in the length direction of an inner cavity of the valve body and a piston disc arranged on the valve seat, the valve seat is arranged in the inner cavity of the valve body in a sliding mode in the length direction of the valve body, the piston disc is arranged in a valve cylinder of the valve body in a sliding mode, limiting claws are arranged in the valve body, and a valve element is jointly installed on the limiting claws. The invention can solve the following problems in the prior art: according to the stroke characteristics, the existing regulating valve only has a straight-through type and an angular-direction type, the straight-through type flow channel is Z-shaped, the angular-direction type flow channel is L-shaped, and the two channels have the same characteristic, that is, a medium passes through at least one curve when passing through. Under long-term flowing and scouring of media, a bend is extremely prone to being scoured by the media, the phenomenon of inner leakage or even outer leakage of the valve is caused, and therefore the service life of the whole regulating valve is affected.

Description

Technical Field

[0001] The present invention relates to the technical field of regulating valves, and in particular to a synchronous regulating valve. Background Art

[0002] Synchronous control valve is a valve that can adjust the flow of fluid as needed, usually used to control the flow rate of liquid or gas in pipelines, pipes or equipment. This kind of control valve is usually composed of components such as valve body, valve seat, valve core and handle or electric actuator.

[0003] The synchronous regulating valve can adjust the flow of the fluid through manual operation or automatic control system to meet the requirements of different processes or systems. By adjusting the opening of the valve core, the flow rate and flow of the fluid can be accurately controlled, thereby achieving precise control and regulation of the fluid.

[0004] For example, the Chinese patent with publication number CN114623272A discloses a three-stage large adjustable ratio control regulating valve, which has a valve body, a valve cover and a valve seat. The valve body has a liquid inlet cavity on one side and a liquid outlet cavity on the other side. The peripheral wall of the valve seat is provided with an adjustment window connected to the liquid inlet cavity. A valve core is provided in the valve seat, and the valve core includes a large valve core and a small valve core connected to the bottom of the large valve core. Flow windows are provided on the peripheral wall of the large valve core, and the upper end of the large valve core has a valve stem extending out of the valve cover. Under low flow conditions, the small flow is precisely regulated by driving the small valve core through the large valve core. Under high flow conditions, the large flow is precisely controlled by moving the large valve core to adjust the area of ​​the adjustment window on the valve seat, thereby satisfying the high-precision control of the flow under different conditions.

[0005] However, the above-mentioned regulating valve still has some shortcomings in actual use: 1. The existing regulating valves are divided into two types according to the stroke characteristics: straight-through type and angle type. The flow channel of the straight-through type is "Z" shaped, and the flow channel of the angle type is "L" shaped. Both channels have a common feature, that is, the medium must pass through at least one bend when passing through. Under the long-term flow of the medium, the bend is easily washed by the medium, causing internal leakage or even external leakage of the valve, thus affecting the service life of the entire regulating valve.

[0006] 2. In addition, the valve core of the existing regulating valve is a movable structure, but the valve core is large in size. The vibration and unbalanced force caused by the change of medium pressure during movement affect the overall quality of the regulating valve, which may easily lead to damage to the valve core or material leakage.

[0007] Therefore, based on the above-stated viewpoints, there is still room for improvement in the existing control valves. Summary of the invention

[0008] In order to solve the above problems, the present invention provides a synchronous regulating valve, which adopts the following technical solution: A synchronous regulating valve comprises a stationary valve body, wherein the valve body is composed of two symmetrically distributed connecting flanges and a valve cylinder arranged in the middle of the two connecting flanges, and an inner cavity is arranged in the valve body.

[0009] An adjusting member is arranged in the inner cavity of the valve body, and the adjusting member includes a valve seat sliding along the length direction of the inner cavity of the valve body and a piston disc arranged on the valve seat. The valve seat is slidingly arranged in the inner cavity of the valve body along the length direction of the valve body, and the piston disc is slidingly arranged in the valve cylinder of the valve body, and a strip ring groove is provided in the valve cylinder for the piston disc to slide.

[0010] The valve core is used to block the valve seat on the regulating member. The valve body is integrally provided with limit claws at equal intervals along the circumferential direction. The limit claws are integrated with the valve core, and the geometric rotation centers of the valve body, the regulating member and the valve core coincide with the flow channel center of the valve.

[0011] Preferably, the middle part of the valve seat is a threaded structure, the part of the piston disc that contacts the valve seat is also a threaded structure, the two are threadedly connected, and the connecting part of the piston disc and the valve seat also has a No. 1 sealing annular groove, and the No. 1 sealing annular groove between the piston disc and the valve seat is jointly installed with a No. 1 rubber sealing ring.

[0012] A No. 2 sealing annular groove is formed at one end of the piston disc close to the valve cylinder, and a No. 2 rubber sealing ring is installed in the No. 2 sealing annular groove.

[0013] Preferably, a No. 1 ring groove is symmetrically provided between the valve seat and the valve cylinder of the valve body, and a No. 1 annular sealing ring is provided in the two No. 1 ring grooves.

[0014] Preferably, the valve cylinder of the valve body is also provided with two air guide holes for controlling the gas to enter, the air guide holes penetrate the valve cylinder from the strip slide groove of the valve cylinder, and the two air guide holes are installed with a connecting valve by means of screw connection.

[0015] Preferably, a positioner is further provided on the valve body, and a magnetic block slidably mounted on the valve cylinder is provided between the positioner and the valve cylinder of the valve body, and the position of the magnetic block is set corresponding to the position of the piston disk.

[0016] Preferably, one end of the valve core is a conical structure to facilitate the flow of the fluid; the other end of the valve core is a truncated cone structure to control the flow coefficient of the fluid.

[0017] Preferably, V-shaped ring grooves are provided at both ends of the valve body near the two connecting flanges, and V-shaped sealing rings are provided between the V-shaped ring grooves to seal the contact position between the valve body and the connecting flanges.

[0018] Preferably, the valve cylinder is composed of two fixed disks and a fixed ring, both ends of the fixed disks are provided with stepped grooves, the fixed ring abuts against the stepped grooves of the fixed disks, and a fixed sealing ring is also provided in the stepped grooves.

[0019] Preferably, the two connecting flanges clamp the two fixing plates, and connecting holes are penetrated through the connecting flanges, and bolts and nuts are commonly provided on the connecting holes of the two connecting flanges.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. The regulating valve of the present invention can actively control the flow rate of the material flowing in the entire valve body, thereby controlling the transportation of the material, which greatly improves the use range and use efficiency of the entire regulating valve.

[0021] 2. The present invention adopts a method of fixing the valve core and moving the valve seat to realize the transportation of materials in the regulating valve, which can not only reduce the wear of the valve core and ensure the service life of the valve core; but also reduce the vibration and unbalanced force caused by the change of medium pressure during material transportation and the influence of the overall quality of the regulating valve during the movement of the valve seat.

[0022] 3. The present invention ensures the stability of the valve seat during the reciprocating movement through the No. 1 rubber sealing ring, the No. 2 rubber sealing ring and the threaded connection between the valve seat and the piston disc, thereby avoiding the situation where the internal pressure of the valve cylinder becomes unbalanced due to friction of the valve seat during long-term operation, and the No. 1 annular sealing ring of the present invention can greatly improve the sealing performance of the entire regulating valve.

[0023] Fourth, the existing regulating valve is easily eroded by the medium at the bend under the long-term flow of the medium, causing internal leakage or even external leakage of the valve, thereby affecting the service life of the entire regulating valve. The regulating valve of the present invention can drive the medium to flow directly due to its unique design. Its flow path is linear and cannot pass through bends. It not only greatly improves the flow efficiency of the medium, but also ensures the quality of the valve, avoiding leakage of the medium and affecting its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is a schematic diagram of the main structure of the regulating valve of the present invention.

[0026] Figure 2 It is a schematic structural diagram of the valve body of the present invention from a first viewing angle.

[0027] Figure 3 It is a schematic structural diagram of the valve body of the present invention from a second viewing angle.

[0028] Figure 4It is a schematic diagram of the structure between the valve cylinder and the regulating member of the present invention.

[0029] Figure 5 It is a structural explosion diagram of the valve body of the present invention.

[0030] Figure 6 It is a schematic diagram of the structure among the valve seat, the piston disc and the second rubber sealing ring of the present invention.

[0031] Figure 7 It is a schematic diagram of the structure between the positioner and the magnetic block of the present invention.

[0032] Figure 8 It is a schematic diagram of the structure between the V-shaped ring groove and the V-shaped sealing ring of the present invention.

[0033] Fig. 9 It is a schematic diagram of the structure between the valve core and the limiting claw of the present invention from a first perspective.

[0034] Fig.10 It is a schematic diagram of the structure between the valve core and the limiting claw of the present invention from a second viewing angle.

[0035] Explanation of the reference numerals in the accompanying drawings: A. center of flow channel; 1. valve body; 2. connecting flange; 3. valve cylinder; 4. adjusting member; 40. valve seat; 41. piston disc; 42. strip ring groove; 5. valve core; 6. limiting claw; 400. sealing ring groove No. 1; 401. rubber sealing ring No. 1; 402. sealing ring groove No. 2; 403. rubber sealing ring No. 2; 10. ring groove No. 1; 11. ring sealing ring No. 1; 12. air guide hole; 13. connecting valve; 7. positioner; 8. magnetic block; 20. V-shaped ring groove; 21. V-shaped sealing ring; 30. fixing disc; 31. fixing ring; 32. step groove; 33. fixing sealing ring; 90. connecting hole; 91. bolts and nuts. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-Figure 10 This application is described in further detail.

[0037] The embodiment of the present application discloses a synchronous regulating valve; the regulating valve is mainly used in the chemical production process to control the flow, pressure, temperature and other parameters of various chemical substances.

[0038] In the above-mentioned prior art, the sealing performance of the overall assembly is poor, which may easily lead to air leakage of the regulating valve during use, thereby affecting the service life of the entire regulating valve.

[0039] The existing regulating valves are divided into two types according to the stroke characteristics: straight-through type and angle type. The flow channel of the straight-through type is "Z" shaped, and the flow channel of the angle type is "L" shaped. Both channels have a common feature, that is, the medium must pass through at least one bend when passing through. Under the long-term flow of the medium, the bend is easily washed by the medium, causing internal leakage or even external leakage of the valve, thus affecting the service life of the entire regulating valve.

[0040] Reference Figure 1 As shown, a synchronous regulating valve comprises a stationary valve body 1, wherein the valve body 1 is composed of two symmetrically distributed connecting flanges 2 and a valve cylinder 3 arranged in the middle of the two connecting flanges 2, and an inner cavity is arranged in the valve body 1.

[0041] It should be noted that the two connecting flanges 2 are arranged on both sides of the valve cylinder 3, and the valve cylinder 3 is clamped and limited by the two connecting flanges 2 through a number of bolts and nuts 91. At the same time, with the assistance of the fixed sealing ring 33, the connection between the two connecting flanges 2 and the valve cylinder 3 is made tighter to avoid leakage.

[0042] See also Figure 2 , Figure 3 and Figure 4 As shown, the valve cylinder 3 is composed of two fixed disks 30 and a fixed ring 31 . Step grooves 32 are provided at both ends of the fixed disk 30 . The fixed ring 31 abuts against the step groove 32 of the fixed disk 30 , and a fixed sealing ring 33 is also provided in the step groove 32 .

[0043] The two connecting flanges 2 clamp the two fixing plates 30 , and connecting holes 90 are formed through the connecting flanges 2 , and bolts and nuts 91 are arranged on the two connecting flanges 2 .

[0044] The valve cylinder 3 is assembled from two fixed disks 30 and a fixed ring 31, the purpose of which is to facilitate the assembly and maintenance of the entire regulating valve and to facilitate the replacement of a single component in the regulating valve due to wear.

[0045] A strip-shaped annular groove 42 is provided in the valve cylinder 3 for the piston disc 41 to slide, thereby ensuring the movement stroke of the piston disc 41 .

[0046] See also Figure 5 As shown, two connecting flanges 2 clamp two fixing plates 30 , and connecting holes 90 are penetrated through the connecting flanges 2 , and bolts and nuts 91 are arranged on the two connecting flanges 2 .

[0047] It should be noted that by controlling the two connecting flanges 2 to clamp the middle valve cylinder 3 through the cooperation of the bolts and nuts 91, the sliding stability of the valve seat 40 and the piston disc 41 can be greatly improved, avoiding the occurrence of gaps at the connection between the valve cylinder 3 and the two connecting flanges 2 and material leakage.

[0048] See also Figure 4 , Figure 5 and Figure 6 As shown, a structural schematic diagram of the valve seat 40 and the piston disc 41 in the present application; the adjusting member 4 is arranged in the inner cavity of the valve body 1, and the adjusting member 4 includes a valve seat 40 sliding along the length direction of the inner cavity of the valve body 1 and a piston disc 41 arranged on the valve seat 40, the valve seat 40 is slidably arranged in the inner cavity of the valve body 1 along the length direction of the valve body 1, the piston disc 41 is slidably arranged in the valve cylinder 3 of the valve body 1, and a strip ring groove 42 is provided in the valve cylinder 3 for the piston disc 41 to slide.

[0049] The valve core 5 is used to block the valve seat 40 on the regulating member 4. Limit claws 6 are integrally arranged at equal intervals in the circumferential direction in the valve body 1. The limit claws 6 are integrated with the valve core 5, and the geometric rotation centers of the valve body 1, the regulating member 4 and the valve core 5 coincide with the flow channel center A of the valve.

[0050] The flow channel center A is the channel for the medium to flow. For details, please refer to Figure 3 shown.

[0051] In the initial state, the valve core 5 is integrally mounted on the limiting claw 6 , and the limiting claw 6 is connected to the valve body 1 .

[0052] The valve cylinder 3 of the valve body 1 is also provided with two air guide holes 12 for controlling the gas to enter. The air guide holes 12 penetrate the valve cylinder 3 from the strip-shaped slide groove of the valve cylinder 3 outward, and the two air guide holes 12 are connected to the valve 13 by screw connection.

[0053] During the specific implementation, firstly, the connecting flanges 2 at both ends of the entire regulating valve are connected to the external pipeline, and then the two connecting valves 13 at the lower end of the valve cylinder 3 are connected to the external known gas warehouse, so that the gas warehouse can pass the gas into the valve cylinder 3 through the connecting valves 13.

[0054] A piston disc 41 is slidably disposed in the valve cylinder 3 , and the piston disc 41 divides the valve cylinder 3 into two working areas for easy ventilation and for the sliding movement of the piston disc 41 .

[0055] When the connecting valve 13 on one side of the valve cylinder 3 is ventilated, the gas enters the corresponding strip-shaped slide groove of the valve cylinder 3 through the connecting valve 13 on one side, pushing the valve seat 40 and the piston disc 41 in the valve cylinder 3 to move toward the end away from the valve core 5. At this time, the valve core 5 is separated from the valve seat 40, so that the inner cavity of the entire valve body 1 is linked with the external equipment. At this time, the flow of materials can be controlled through the valve body 1.

[0056] When the connecting valve 13 on the other side of the valve cylinder 3 is ventilated, the gas enters the corresponding strip-shaped slide groove of the valve cylinder 3 through the connecting valve 13 on the other side, pushing the valve seat 40 and the piston disc 41 in the valve cylinder 3 to move toward the end close to the valve core 5. At this time, after the valve core 5 and the valve seat 40 are close to each other, the inner cavity of the entire valve body 1 can be closed to prevent the material from flowing in the regulating valve.

[0057] See also Figure 7 As shown, further, in order to realize the flow of materials in the regulating valve, the present application also proposes that a positioner 7 is also provided on the valve body 1, and a magnetic block 8 slidably installed on the valve cylinder 3 is provided between the positioner 7 and the valve cylinder 3 of the valve body 1, and the position of the magnetic block 8 is set corresponding to the position of the piston disk 41.

[0058] It should be noted that the positioner 7 is a known structure, and the role of the positioner 7 in the regulating valve is mainly reflected in the following aspects: Improving the regulation accuracy and reliability: the positioner 7 receives the output signal of the regulator and converts it into a gas signal, thereby accurately controlling the action of the pneumatic actuator. This ensures that the position of the regulating valve is accurate, overcomes the influence of the friction force of the valve stem and the unbalanced force of the medium, and enables the valve to be correctly positioned according to the signal of the regulator.

[0059] Improve static and dynamic characteristics: Positioner 7 can improve the static characteristics of the control valve and increase the linearity of the valve position; at the same time, it can also improve the dynamic characteristics, reduce signal transmission lag, shorten the response time, and make the control valve move more quickly.

[0060] In specific implementation, in order to achieve the regulation of the logistics flow of the regulating valve, the present application also proposes a positioner 7 and a magnet 8. When the regulating valve needs to be opened, the valve seat 40 and the piston disk 41 move away from the valve core 5. When the piston disk 41 moves, the magnet 8 on the outer wall of the valve cylinder 3 moves synchronously with the piston disk 41.

[0061] There is a close relationship between the regulating valve and the positioner 7. The positioner 7 is an important accessory of the regulating valve, and its function is to achieve precise control and positioning of the regulating valve. In a fluid control system, the regulating valve usually needs to adjust parameters such as flow, pressure or temperature according to system requirements, and the positioner 7 is used to control and adjust the opening of the regulating valve to achieve precise fluid control.

[0062] Specifically, the positioner 7 adjusts the regulating valve to achieve a predetermined opening by detecting the system feedback signal (such as pressure, temperature, flow, etc.) and the set value. The positioner 7 can automatically adjust the position of the regulating valve according to the system signal to ensure that the system operates stably and accurately under the set working state.

[0063] See also Figure 6As shown, in addition, one end of the valve core 5 is a conical structure to facilitate the flow of fluid; the other end of the valve core 5 is a truncated cone structure. The diameter of the valve seat 40 gradually decreases along its length direction toward the end away from the valve core 5.

[0064] It should be noted that the special structure of the valve core 5 can greatly reduce the stability of the material flow in the regulating valve, because the valve core 5 has a tapered streamlined structure along the flow direction of the material, which can effectively reduce the resistance during the material flow and ensure the stability of the material flow.

[0065] The diameter of the valve seat 40 gradually decreases along its length toward the end away from the valve core 5. The purpose is to ensure the stability of the valve seat 40 when it moves. When the valve seat 40 approaches the valve core 5, it can ensure that the valve seat 40 and the valve core 5 are in closer contact, and at the same time reduce the friction force when the valve seat 40 moves; when the valve seat 40 moves in the direction away from the valve core 5, the valve seat 40 can fit more smoothly and precisely with the strip groove inside the valve seat 40.

[0066] Reference Figure 7 and Figure 8 As shown, when the valve seat 40 moves, the movable disk on the valve seat 40 moves synchronously. Therefore, in order to facilitate the firmness between the valve seat 40 and the piston disk 41, the present application also proposes a structural schematic diagram of the connection between the valve seat 40 and the piston disk 41; specifically, the middle part of the valve seat 40 is a threaded structure, and the part where the piston disk 41 contacts the valve seat 40 is also a threaded structure, and the two are threadedly connected. The part where the piston disk 41 and the valve seat 40 are connected also has a No. 1 sealing annular groove 400, and the No. 1 sealing annular groove 400 between the piston disk 41 and the valve seat 40 is jointly installed with a No. 1 rubber sealing ring 401.

[0067] A second sealing annular groove 402 is formed at one end of the piston disc 41 close to the valve cylinder 3 , and a second rubber sealing ring 403 is installed in the second sealing annular groove 402 .

[0068] The piston disc 41 is installed on the valve seat 40 by means of threaded rotation, which not only has a simple structure and facilitates the installation between the piston disc 41 and the valve seat 40, but also can maintain the firmness between the two.

[0069] Secondly, a No. 1 sealing annular groove 400 is also provided at the threaded connection between the piston disc 41 and the valve seat 40, and a No. 1 rubber sealing ring 401 is installed in the No. 1 sealing annular groove 400, which can further improve the sealing performance of the connection between the piston disc 41 and the valve seat 40 at the threaded connection position of the two.

[0070] In addition, a No. 2 sealing annular groove 402 is jointly provided between the piston disc 41 and the fixing ring 31 of the valve cylinder 3. A No. 2 rubber sealing ring 403 is arranged in the No. 2 sealing annular groove 402, which can ensure the sealing of the piston disc 41 when the piston disc 41 moves along the length direction of the valve cylinder 3, and avoid air leakage when the inside of the valve cylinder 3 is ventilated, thereby affecting the movement of the piston disc 41.

[0071] Reference Figure 8 As shown, specifically, V-shaped ring grooves 20 are provided at both ends of the valve body 1 near the two connecting flanges 2, and V-shaped sealing rings 21 are provided between the V-shaped ring grooves 20 for sealing the contact position between the valve body 1 and the connecting flanges 2.

[0072] The purpose of the V-shaped sealing ring 21 is to improve the stability between the connecting flange 2 and the fixed disk 30. When the connecting flange 2 and the fixed disk 30 are in contact, the V-shaped sealing ring 21 is pressed and gathered toward the middle, causing the V-shaped sealing ring 21 to deform, thereby ensuring the sealing between the connecting flange 2 and the fixed disk 30 and avoiding leakage when the material flows in the regulating valve.

[0073] See also Fig. 9 and Fig.10 As shown, one end of the valve core 5 is a conical structure to facilitate the flow of fluid; the other end of the valve core 5 is a truncated cone structure.

[0074] One end of the valve core 5 is a conical structure, the purpose of which is to ensure the stability of material flow through a streamlined structure and reduce the pressure on the valve core 5 during the material flow; the other end of the valve core 5 is a truncated cone structure, the purpose of which is to facilitate the fit between the valve seat 40 and the valve core 5. When the valve core 5 is sleeved on the valve seat 40 but not in contact with the valve seat 40, the closer the valve seat 40 is to the valve core 5, the smaller the cross-sectional area between the valve seat 40 and the valve core 5, and therefore the smaller the material flow rate; otherwise, it is larger.

[0075] The positioner 7 constantly monitors the flow rate of the material in the regulating valve. When it is necessary to control the flow rate of the material in the regulating valve, different proportions of gas are introduced into the two connecting valves 13. During the flow of gas, the position of the piston disk 41 and the valve seat 40 are gradually controlled, thereby controlling the distance between the valve seat 40 and the valve core 5, thereby achieving the adjustment of the material transport volume of the regulating valve.

[0076] In the present application, the valve core 5 fixes the valve seat 40 to move, and this method has the following advantages: Simplified structure: Compared with the regulating valve with a movable valve core 5, the regulating valve with a fixed valve core 5 has a simpler structure, lower maintenance and servicing costs, and is more convenient to operate.

[0077] Fixing the valve core 5 can prevent the valve core 5 from moving due to shock or vibration during use, thereby maintaining the stability of the material flow rate.

[0078] The fixed valve core 5 does not need to be adjusted frequently, is relatively more durable, and has a longer service life.

[0079] During operation: the first step is to connect the connection flanges 2 on both sides of the regulating valve to the external pipelines; and connect the two connection valves 13 below the regulating valve to the external known equipment.

[0080] Step 2: Start the equipment on the connecting valve 13 and start to ventilate the connecting valve 13 on one side. The gas enters the corresponding strip-shaped slide groove of the valve cylinder 3 through the connecting valve 13 on one side, pushing the valve seat 40 and the piston disc 41 in the valve cylinder 3 to move toward the end away from the valve core 5. At this time, the valve core 5 is separated from the valve seat 40, so that the inner cavity of the entire valve body 1 is linked with the external equipment. At this time, the flow of materials can be controlled through the valve body 1.

[0081] Step 3: After the connecting valve 13 on the other side of the valve cylinder 3 is ventilated, the gas enters the corresponding strip-shaped slide groove of the valve cylinder 3 through the connecting valve 13 on the other side, pushing the valve seat 40 and the piston disc 41 in the valve cylinder 3 to move toward the end close to the valve core 5. At this time, after the valve core 5 and the valve seat 40 are close to each other, the inner cavity of the entire valve body 1 can be closed to prevent the material from flowing in the regulating valve.

[0082] Step 4: The positioner 7 constantly monitors the flow rate of the material in the regulating valve. When the flow rate of the material in the regulating valve needs to be controlled, different proportions of gas are introduced into the two connecting valves 13. During the flow of gas, the positions of the piston disc 41 and the valve seat 40 are gradually controlled, thereby controlling the distance between the valve seat 40 and the valve core 5. It should be noted that one end of the valve seat 40 is sleeved on the valve core 5. When the valve seat 40 is closer to the valve core 5, the cross-sectional area between the valve seat 40 and the valve core 5 is smaller, and therefore the flow rate of the material is smaller; otherwise, it is larger.

[0083] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A synchronous regulating valve, characterized in that: include A stationary valve body (1), the valve body (1) comprising two symmetrically distributed connecting flanges (2) and a valve cylinder (3) arranged in the middle of the two connecting flanges (2), and an inner cavity is arranged in the valve body (1); An adjusting member (4) is arranged in the inner cavity of the valve body (1), the adjusting member (4) comprising a valve seat (40) sliding along the length direction of the inner cavity of the valve body (1) and a piston disc (41) arranged on the valve seat (40), the valve seat (40) being slidably arranged in the inner cavity of the valve body (1) along the length direction of the valve body (1), the piston disc (41) being slidably arranged in the valve cylinder (3) of the valve body (1), and a strip-shaped annular groove (42) for the piston disc (41) to slide is provided in the valve cylinder (3); The valve core (5) is used to block the valve seat (40) on the regulating member (4), and the valve body (1) is provided with limit claws (6) at equal intervals along the circumferential direction. The limit claws (6) and the valve core (5) are integrated, and the geometric rotation centers of the valve body (1), the regulating member (4) and the valve core (5) all coincide with the flow channel center of the valve.

2. A synchronous regulating valve according to claim 1, characterized in that: The middle portion of the valve seat (40) is in a threaded structure, and the portion of the piston disc (41) in contact with the valve seat (40) is also in a threaded structure, and the two are threadedly connected. The connecting portion of the piston disc (41) and the valve seat (40) is also provided with a No. 1 sealing annular groove (400), and a No. 1 rubber sealing ring (401) is installed in the No. 1 sealing annular groove (400) between the piston disc (41) and the valve seat (40); A second sealing annular groove (402) is formed at one end of the piston disc (41) close to the valve cylinder (3), and a second rubber sealing ring (403) is installed in the second sealing annular groove (402).

3. A synchronous regulating valve according to claim 1, characterized in that: A first ring groove (10) is symmetrically provided between the valve seat (40) and the valve cylinder (3) of the valve body (1), and a first annular sealing ring (11) is provided in the two first ring grooves (10).

4. A synchronous regulating valve according to claim 1, characterized in that: The valve cylinder (3) of the valve body (1) is also provided with two air guide holes (12) for controlling the entry of gas, the air guide holes (12) extending from the strip-shaped slide groove of the valve cylinder (3) to the outside through the valve cylinder (3), and the two air guide holes (12) are connected to the valve (13) by means of screw connection.

5. A synchronous regulating valve according to claim 1, characterized in that: The valve body (1) is also provided with a positioner (7), and a magnetic block (8) slidably mounted on the valve cylinder (3) is provided between the positioner (7) and the valve cylinder (3) of the valve body (1), and the position of the magnetic block (8) is arranged corresponding to the position of the piston disc (41).

6. A synchronous regulating valve according to claim 1, characterized in that: One end of the valve core (5) is a conical structure to facilitate the flow of the fluid; the other end of the valve core (5) is a truncated cone structure to control the flow coefficient of the fluid.

7. A synchronous regulating valve according to claim 1, characterized in that: V-shaped annular grooves (20) are provided at both ends of the valve body (1) near the two connecting flanges (2), and a V-shaped sealing ring (21) is provided between the V-shaped annular grooves (20) for sealing the contact position between the valve body (1) and the connecting flange (2).

8. The synchronous regulating valve according to claim 1, characterized in that: The valve cylinder (3) is composed of two fixed disks (30) and a fixed ring (31). Step grooves (32) are provided at both ends of the fixed disk (30). The fixed ring (31) abuts against the stepped groove (32) of the fixed disk (30), and a fixed sealing ring (33) is also provided in the stepped groove (32).

9. A synchronous regulating valve according to claim 1, characterized in that: The two connecting flanges (2) clamp the two fixing plates (30), and connecting holes (90) are formed through the connecting flanges (2). Bolts and nuts (91) are commonly provided on the connecting holes (90) of the two connecting flanges (2).

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